塔里木盆地柯坪地区下寒武统肖尔布拉克组地球化学特征及其沉积和成岩环境意义
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郑剑锋,黄理力,袁文芳,朱永进,乔占峰
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Geochemical features and its significance of sedimentary and diagenetic environment in the Lower Cambrian Xiaoerblak Formation of Keping area, Tarim Basin
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Jian-feng ZHENG,Li-li HUANG,Wen-fang YUAN,Yong-jin ZHU,Zhan-feng QIAO
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表1 肖尔布拉克组白云岩碳氧同位素、锶同位素、有序度测试结果
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Table 1 Order degree, δ13C, δ18O and 87Sr / 86Sr value of Xiaoerblak Formation dolomite
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| 样品 编号 | 岩性 | 层段 | δ13C/ ‰(PDB) | δ18O/ ‰( PDB) | 87Sr/86Sr±2δ | 古盐度(Z) | 古温度(T) /℃ | 有序度 |
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| X1-1 | 层纹石白云岩 | 肖下段 | 0.88 | -6.93 | 0.709 374±3 | 125.7 | 21.6 | 0.77 | | X1-2 | 层纹石白云岩 | 肖下段 | 1.34 | -7.67 | 0.708 992±8 | 126.2 | 25.0 | 0.50 | | X2-1 | 凝块石白云岩 | 肖中1亚段 | 2.85 | -7.33 | 0.708 843±6 | 129.5 | 23.4 | 0.55 | | X2-2 | 凝块石白云岩 | 肖中1亚段 | 2.91 | -7.42 | 0.709 289±13 | 129.6 | 23.8 | / | | X3-1 | 凝块石白云岩 | 肖中2亚段 | 3.03 | -7.45 | 0.709 167±7 | 129.8 | 24.0 | 0.60 | | X3-2 | 凝块石白云岩 | 肖中2亚段 | 3.35 | -7.51 | 0.709 189±4 | 130.4 | 24.2 | 0.68 | | X4-1 | 细晶(砂屑)白云岩 | 肖中3亚段 | 2.66 | -7.11 | 0.709 122±8 | 129.2 | 22.4 | 0.65 | | X4-2 | 粘结砂屑白云岩 | 肖中3亚段 | 2.67 | -6.09 | 0.709 113±17 | 129.7 | 17.8 | 0.59 | | X4-3 | 泡沫绵层云岩 | 肖中3亚段 | 2.10 | -6.86 | 0.709 105±6 | 128.2 | 21.2 | 0.45 | | X4-4 | 泡沫绵层白云岩 | 肖中3亚段 | 2.26 | -6.36 | 0.709 113±10 | 128.8 | 19.0 | 0.56 | | X5-1 | 叠层石白云岩 | 肖上段 | 0.36 | -6.40 | 0.709 412±6 | 124.9 | 19.2 | 0.60 | | X5-2 | 含泥颗粒白云岩 | 肖上段 | -0.13 | -6.83 | 0.713 218±2 | 123.6 | 21.1 | / | | X5-3 | 泥质泥晶白云岩 | 肖上段 | -0.78 | -7.51 | 0.713 343±11 | 122.0 | 24.2 | / |
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